Prior Experience and Presidential Greatness – The New York Times

Is presidential greatness really enhanced by certain prior experiences? A new paper by political scientists Joseph Uscinski and Arthur Simon provides an answer…Perhaps the most consistent predictor of presidential greatness, Messrs. Uscinski and Simon found, is military service.

Source: Prior Experience and Presidential Greatness – The New York Times

Here’s a list of US Presidents by experience:

https://en.wikipedia.org/wiki/List_of_Presidents_of_the_United_States_by_previous_experience